Compact motion estimator with a simplified vector search strategy maintaining encoded picture quality

A compact motion estimator employing a simplified two-step full-search strategy has been proposed. In the first step, 2-pel precision motion vectors are obtained using 4-to-1 sub-sampling with a LPF. In the second step, half-pel precision vectors are obtained. The strategy reduces the number of oper...

Full description

Saved in:
Bibliographic Details
Main Authors: Hayashi, Naoya, Kitsuki, Toshiaki, Shiraishi, Takeshi, Yokoyama, Toshimichi, Oobuchi, Katsunari, Ooi, Yasushi, Ikegami, Seishi, Tokuda, Norio, Honma, Hideki, Tamitani, Ichiro, Miyazaki, Takashi, Miyamoto, Yoshihiro, Ohta, Mutsumi
Format: Conference Proceeding
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A compact motion estimator employing a simplified two-step full-search strategy has been proposed. In the first step, 2-pel precision motion vectors are obtained using 4-to-1 sub-sampling with a LPF. In the second step, half-pel precision vectors are obtained. The strategy reduces the number of operations and memory access cycles to 1/11 and 1/2, respectively, while maintaining encoded picture quality within 0.2 dB differences in SNRs. Using this estimator, a bidirectional motion compensation LSI with a -16.0/+15.5 pels search range has been developed for realtime MPEG1 video encoding.
ISSN:0886-5930